dpb <none@non.net> wrote in message <kbhqvf$l2s$1@speranza.aioe.org>...> On 12/26/2012 7:45 PM, maryam wrote:> > dpb <none@non.net> wrote in message <kbg5ol$ugl$1@speranza.aioe.org>...> >> On 12/26/2012 5:03 PM, maryam wrote:> >> > dpb <none@non.net> wrote in message <kbfhar$1lo$1@speranza.aioe.org>...> ...> > >> >> doc interp1> >> >>> >> >> >> X = 0:10; V = sin(X); Xq = 0:.25:10;> >> >> >> Vq = interp1(X,V,Xq);> ...> > >> > thank you very much for your answer but I mean we have a matrix n-by-m:> >> > assume M= [a b c;d e f; g h i]> >> > I want to interpolate its rows so that is equal to> >> > M=[a a+d a+2d a+3d ... 7d b b+d ... b+7d c... c+7d ; d... d+7d...> >> f+7d ;> >> > g ... i+7d]> >> > Can you explain me how I could do it?> >>> >> I'm virtually certain you asked this same question some days ago and I> >> told you then the same thing...> >>> >> Use interp1() as the above example w/ an interpolating vector of the> >> points at which you want interpolants. Here's why I think I remember> >> the question and the response, as I pointed out then, since interp1()> >> works on columns you'll need to transpose, interpolate, then transpose> >> back.> >>> >> I can't interpret the above [a a+d a+2d ... ) precisely but assuming d> >> here is a different 'd' than that of the value in the original M(2,1)> >> and is just a delta then the interpolant would seem to be> >> linspace(0,N*d,N+1) where N is the number of intervals (7 above) added> >> to a, b, c, ..., etc.> >>> ...> > > thank you so much, I'm Beginner in matlab,> > I apologize for my request> > Is it possible give me matlab code of my question?> > I couldn't use 'for' command or M(:,columns) ...> > my matrix is 1000-by-1200 d=delta=1/16> > its values (arrays) is arbitrary here> > That's identical to the example I gave except on an array instead of a > vector...and a still-to-be-determined precisely interpolant.> > What does the 1/16 delta refer to--is it a constant or a fraction of the > distance between columns, or what? Your description isn't precise (or > at least I can't decipher what it is you want clearly enough to actually > write a piece of specific code).> > Can you give a very small example of a dataset that you could compute > the desired result of by hand? It wouldn't have to be but one row and a > few values to illustrate what you're actually trying to do...> -------------------------------------------------------Hi thank you so much for your replyHere is a simple code, that Matlab wouldn?t run it:

each d vector element like d(1)=12.5 includes an integer part(12) and a fractional one(0.5).I need an interpolator to move the data an arbitrary fraction of the space between each 2 elements, this fraction is quantized to 1/16 of the space between 2 elements, so 15 different interpolators are needed to move the data by i /16 of this space, where i = 1 : 15, A simple interpolator is obtained from a truncated sinc function that the coefficients are weighted by a window like kaiser.

I didn?t know how to round d vector?And how could I interpolate rows of s matrix?